Constant constructor can't call non-constant super constructor of 'RichText'.
Try calling a const constructor in the superclass, or removing the keyword 'const' from the constructor.
main.dart.js:11226 Uncaught LateInitializationError: Field '_defaultBinaryMessenger' has already been initialized.
at Object.wrapException (main.dart.js:11226:17)
at Object._lateWriteOnceCheck (main.dart.js:12563:17)
at WidgetsFlutterBinding.set$_defaultBinaryMessenger (main.dart.js:133871:9)
at WidgetsFlutterBinding.initInstances$0 (main.dart.js:138222:13)
at WidgetsFlutterBinding.initInstances$0 (main.dart.js:138244:13)
at WidgetsFlutterBinding.initInstances$0 (main.dart.js:138301:13)
at WidgetsFlutterBinding.initInstances$0 (main.dart.js:138317:13)
at WidgetsFlutterBinding.initInstances$0 (main.dart.js:138366:13)
at WidgetsFlutterBinding.BindingBase$0 (main.dart.js:101450:12)
at Object.WidgetsFlutterBinding$ (main.dart.js:37181:10)
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Mac OS X 10.14.5 18F132, locale
zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.2.1)
[✓] Android Studio (version 3.4)
[✓] Connected device (1 available)
列表滑动停靠效果2(sliver_stick_demo_page)进入页面再出来好像会报
The following assertion was thrown while finalizing the widget tree:
Looking up a deactivated widget's ancestor is unsafe.
At this point the state of the widget's element tree is no longer stable.
To safely refer to a widget's ancestor in its dispose() method, save a reference to the ancestor by calling dependOnInheritedWidgetOfExactType() in the widget's didChangeDependencies() method.
大佬能不能帮我解释一下为什么,还有页面几个Future.delayed的用法,为什么不用就会报错